Lecture 6: Main Sequence Stars
... of the light trying to pass through the material. It turns-‐out that opacity is a very strong funcCon of temperature. At low temperatures everything is neutral (or even molecular) and the main sour ...
... of the light trying to pass through the material. It turns-‐out that opacity is a very strong funcCon of temperature. At low temperatures everything is neutral (or even molecular) and the main sour ...
The Sun - SCHOOLinSITES
... • Dark lines form in the spectra of stars when gases in the stars’ outer layers absorb specific wavelengths of the light that passes through the layers. • By studying the spectrum of a star, scientists can determine the amounts of elements that are present in a star’s atmosphere. ...
... • Dark lines form in the spectra of stars when gases in the stars’ outer layers absorb specific wavelengths of the light that passes through the layers. • By studying the spectrum of a star, scientists can determine the amounts of elements that are present in a star’s atmosphere. ...
key vocabulary - El blog del Séneca
... Galaxy: It is an enormous cloud of stars and other celestial bodies. Celestial body: All the things we can find in the universe ( galaxies, stars, planets, satellites, asteroids, comets and meteorites ) Star: A celestial body made of gas. It has a spherical shape. It produces heat and light. Natural ...
... Galaxy: It is an enormous cloud of stars and other celestial bodies. Celestial body: All the things we can find in the universe ( galaxies, stars, planets, satellites, asteroids, comets and meteorites ) Star: A celestial body made of gas. It has a spherical shape. It produces heat and light. Natural ...
Chapter 1 Question Set
... 3. What is the difference between a hypothesis & a law? Between a law & a theory? Answer (p 4) A hypothesis is a proposal or suggestion about how or why something happened (often put forth as a theory: “My theory is that the dog ran away because the children pulled her tail.”). A law is a rule or st ...
... 3. What is the difference between a hypothesis & a law? Between a law & a theory? Answer (p 4) A hypothesis is a proposal or suggestion about how or why something happened (often put forth as a theory: “My theory is that the dog ran away because the children pulled her tail.”). A law is a rule or st ...
The Big Bang and Early Astronomers
... • Theories can be modified or rejected as more evidence is gathered • Theories are testable ASTRONOMY: The scientific study of the universe and the objects in it, including stars, planets, nebulae, and galaxies. Astronomy deals with the position, size, motion, composition, energy, and evolution of c ...
... • Theories can be modified or rejected as more evidence is gathered • Theories are testable ASTRONOMY: The scientific study of the universe and the objects in it, including stars, planets, nebulae, and galaxies. Astronomy deals with the position, size, motion, composition, energy, and evolution of c ...
chapter7
... detected a much lower flux of neutrinos than expected ( the “solar neutrino problem”). Recent results have proven that neutrinos change (“oscillate”) between different types (“flavors”), thus solving the solar neutrino problem. ...
... detected a much lower flux of neutrinos than expected ( the “solar neutrino problem”). Recent results have proven that neutrinos change (“oscillate”) between different types (“flavors”), thus solving the solar neutrino problem. ...
Rachel Henning
... 1. What is the expected fate of our sun? What happens to stars that are much more massive than our sun? In about 5 billion years, the hydrogen in the center of the Sun will start to run out. The helium will get squeezed. This will speed up the hydrogen burning. Our star will slowly puff into a red g ...
... 1. What is the expected fate of our sun? What happens to stars that are much more massive than our sun? In about 5 billion years, the hydrogen in the center of the Sun will start to run out. The helium will get squeezed. This will speed up the hydrogen burning. Our star will slowly puff into a red g ...
Integrative Studies 410 Our Place in the Universe
... • Light stars like the Sun end up as White Dwarfs • Massive stars (more than 8 solar masses) end up as Neutron Stars • Very massive stars (more than 25 solar masses) end up as Black Holes ...
... • Light stars like the Sun end up as White Dwarfs • Massive stars (more than 8 solar masses) end up as Neutron Stars • Very massive stars (more than 25 solar masses) end up as Black Holes ...
Integrative Studies 410 Our Place in the Universe
... • The energy of the electron depends on orbit • When an electron jumps from one orbital to another, it emits (emission line) or absorbs (absorption line) a photon of a certain energy • The frequency of emitted or absorbed photon is related to its energy ...
... • The energy of the electron depends on orbit • When an electron jumps from one orbital to another, it emits (emission line) or absorbs (absorption line) a photon of a certain energy • The frequency of emitted or absorbed photon is related to its energy ...
HERE
... off most of their light in the BLUE. • Small, COOL stars are red. • BLUE is HOT, red is not. ...
... off most of their light in the BLUE. • Small, COOL stars are red. • BLUE is HOT, red is not. ...
Slide 1
... multiple stars. In many cases, the stars are so close that mass transfer can occur. If mass from a red giant flows onto a white dwarf, explosive brightness changes of 10000× occur (novae), to 150,000 L. So much matter can flow onto the white dwarf star that the Chandrasekhar Limit (1.4 M) can ...
... multiple stars. In many cases, the stars are so close that mass transfer can occur. If mass from a red giant flows onto a white dwarf, explosive brightness changes of 10000× occur (novae), to 150,000 L. So much matter can flow onto the white dwarf star that the Chandrasekhar Limit (1.4 M) can ...
OUR SOLAR SYSTEM
... S4E2: Students will model the position and motion of the earth in the solar system and will explain the role of relative position and motion in determining sequence of the phases of the moon. • Demonstrate the relative size and order from the sun of the planets in the solar system. ...
... S4E2: Students will model the position and motion of the earth in the solar system and will explain the role of relative position and motion in determining sequence of the phases of the moon. • Demonstrate the relative size and order from the sun of the planets in the solar system. ...
Topics for this week
... The Sun radiates tremendous amount of energy from its surface. Where does this energy come from? Nuclear fusion inside the Sun generates energy while fusing hydrogen nuclei to make helium nuclei. The reaction chain is referred to as the proton-proton chain because the first reaction is the fusion of ...
... The Sun radiates tremendous amount of energy from its surface. Where does this energy come from? Nuclear fusion inside the Sun generates energy while fusing hydrogen nuclei to make helium nuclei. The reaction chain is referred to as the proton-proton chain because the first reaction is the fusion of ...
The Sun: Our nearest star
... neutrinos that flow through a tank with 100,000 gallons of cleaning fluid turned a chlorine atom into an argon atom. Started counting and they came up short by about a factor of three. • This was the great Solar Neutrino Problem. ...
... neutrinos that flow through a tank with 100,000 gallons of cleaning fluid turned a chlorine atom into an argon atom. Started counting and they came up short by about a factor of three. • This was the great Solar Neutrino Problem. ...
PPT
... photons. The photons bounce off electrons and make a “random walk”. It can take over 100,000 years for a photon to reach the surface. ...
... photons. The photons bounce off electrons and make a “random walk”. It can take over 100,000 years for a photon to reach the surface. ...
Ay123 Fall 2011 STELLAR STRUCTURE AND EVOLUTION Problem Set 5
... temperature for the same value of ρ. Make sure the temperature range of your plot covers both ionized and non-ionized states. 2. Assume the Sun is fully ionized and fully convective all the way to its surface. (a) Show that the sound speed close to the surface is given by c2 = (γ − 1) g z where z = ...
... temperature for the same value of ρ. Make sure the temperature range of your plot covers both ionized and non-ionized states. 2. Assume the Sun is fully ionized and fully convective all the way to its surface. (a) Show that the sound speed close to the surface is given by c2 = (γ − 1) g z where z = ...
Stars
... • Neutrinos are emitted when electrons and protons combine to form neutrons. • Most of the energy of a supernova is carried off by neutrinos, for SN1987A this was 1046 Watts. • Roughly 1013 neutrinos from this supernova passed through your body on Feb 24, 1987. • Neutrinos interact so weakly with ma ...
... • Neutrinos are emitted when electrons and protons combine to form neutrons. • Most of the energy of a supernova is carried off by neutrinos, for SN1987A this was 1046 Watts. • Roughly 1013 neutrinos from this supernova passed through your body on Feb 24, 1987. • Neutrinos interact so weakly with ma ...
